Result:
  Query Type: IPV4
  Query: 216.73.216.1
  Target: 216.73.216.1
  Source: RDAP (https://rdap.org/ redirect)
  RDAP JSON: https://rdap.arin.net/registry/ip/216.73.216.1

IP NETWORK:
  Handle: NET-216-73-216-0-1
  Object Class: ip network
  WHOIS (Port43): whois.arin.net
  IP Range Start: 216.73.216.0
  IP Range End: 216.73.219.255
  IP Version: v4
  Network Name: AWS-ANTHROPIC
  Network Type: ASSIGNMENT
  Parent Handle: NET-216-73-208-0-1
Registrar & Abuse:
  Abuse Email: arin@anthropic.com
  Abuse Phone: +1-415-236-0599
Status:
  active
Events:
  Last Changed: 2024-06-05T12:42:32-04:00
  Registered: 2024-06-05T12:42:32-04:00
Entities:
  - Anthropic, PBC [registrant]
    Kind: org
    Address: 548 Market St.
PMB 90375
San Francisco
CA
94104-5401
United States
    Events:
      Last Changed: 2023-08-22T17:10:25-04:00
      Registered: 2023-07-31T16:51:11-04:00
    Links:
      - [self] https://rdap.arin.net/registry/entity/AP-2440 (application/rdap+json)
      - [alternate] https://whois.arin.net/rest/org/AP-2440 (application/xml)
  - Anthropic [dns, abuse, routing, noc, technical, administrative]
    Kind: group
    Address: 548 Market St.
PMB 90375
San Francisco
CA
94104-5401
United States
    Email: arin@anthropic.com
    Phone: +1-415-236-0599
    Events:
      Last Changed: 2025-08-14T16:34:43-04:00
      Registered: 2023-07-31T16:45:12-04:00
    Links:
      - [self] https://rdap.arin.net/registry/entity/ANTHR5-ARIN (application/rdap+json)
      - [alternate] https://whois.arin.net/rest/poc/ANTHR5-ARIN (application/xml)
CIDR:
  - 216.73.216.0/22
RDAP Conformance:
  - nro_rdap_profile_0
  - rdap_level_0
  - cidr0
  - arin_originas0
Links:
  - [self] https://rdap.arin.net/registry/ip/216.73.216.0 (application/rdap+json)
  - [alternate] https://whois.arin.net/rest/net/NET-216-73-216-0-1 (application/xml)
  - [up] https://rdap.arin.net/registry/ip/216.73.208.0/21 (application/rdap+json)
Notices:
  * Terms of Service
    - By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use
    - Link: [terms-of-service] https://www.arin.net/resources/registry/whois/tou/ (text/html)
  * Whois Inaccuracy Reporting
    - If you see inaccuracies in the results, please visit: 
    - Link: [inaccuracy-report] https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ (text/html)
  * Copyright Notice
    - Copyright 1997-2025, American Registry for Internet Numbers, Ltd.